louver set are important sets of equipment for commercial uses and aid in a host of distinct purposes. These louver set are specifically made to cut down on energy costs and act as efficient exchangers of heat and cooling effects on distinct processes.
Full Answer
What is a louver?
Common Questions about Louvers What Is a Louver? A louver includes a set of blades that are either fixed or operable. It helps maintain proper airflow throughout a metal building and keep elements like dirt, water, and debris at bay, away from the building.
What is the purpose of a louver ventilation system?
Some designs allow the façade of a building to provide natural ventilation for the building to ‘breathe’.. Louver systems are installed on most buildings to ensure a smoother intake and exhaust of air, and also to provide stronger resistance against rain and noise intrusion.
What is the purpose of metal building louvers?
What Is the Purpose of Louvers? There are many different components that account for the sturdiness, safety, and energy efficiency of a metal building. From roof curbs to skylights, flashings to canopies – all these accessories play an important role in supporting the structural integrity of the building.
How do you choose a louver blade?
A number of fixed or operable blades mounted in a frame can provide this functionality. The basic considerations for selecting louvers are Louver Free Area, Water Penetration, and Resistance to Airflow (Pressure Loss). Once these concepts are understood, they can be used to properly apply a louver.
What Is a Louver?
A louver is a series of parallel, horizontal boards that regulate airflow or light penetration of a window or door. These boards are panels of glass, wood, or other material. They can be fixed in place or moveable to allow for a change in the amount of air or light you let in.
Why do we need louvers?
You’ll find louvers on buildings that might have problems with rain, wind, or excessive noise. Using louvers allows for protection against these concerns while still allowing for proper airflow through and around the building.
What are the different types of louvers?
There are drainable and non-drainable, wind-driven, rain resistant, or extreme-weather resistant. Some are even acoustically rated.
What to consider when choosing an architectural louver system?
There are a number of elements to think about when deciding on an architectural louver system for a building. Your construction specialties, whether you need more airflow, water or wind protection, or noise reduction will determine your selection.
Where are louvers located?
Most louvers are on the outside of the building and therefore, need to blend with the aesthetics of the building as much as they need to be functional.
Can you intermix blades?
You can intermix blade depth and frequencies for a staggered placement. They come in a variety of finishes and you can create almost any look imaginable with them.
Why do we need louvers?
As the name suggests, these louvers are there to protect a building from the rain. They promote natural airflow to prevent wind-driven rain from entering the building or damaging the exterior.
What is a louver?
A louver tends to be a set of fixed blade-like panels installed onto the outside of buildings. They work as both an air inlet and exhaust while also protecting a building from weather damage.
Do ventilation louvers work?
Finally, there are ventilation louvers that work as both a rain defense and airflow regulator. These louvers put ventilation as a top priority, so should be used in areas where occasional water ingress is acceptable.
Can you use different colors on a louver?
The functionality you need will determine how creative you can get with the louver you choose. There are plenty of options for different colored screens or styles, depending on the materials you use. Although mainly practical, louvers can offer a contemporary design style to older buildings and working plants. Take a look around in the industrial areas near your home, or head to the city to see if you can identify louvers in your local area.
How is louver efficiency measured?
Instead of a "first point of water penetration" value, efficiency of the louver is measured instead. Basically, "how good is the louver at stopping the water?" The efficiency is rated as a percentage, determined from the amount of water that passes through the louver divided by the total water applied during the test. A very efficient louver will have a value from 99-100%. Inefficient louvers will have values below 85%, meaning they allow over 15% of the water applied to pass through the louver.
How to test for water penetration?
The typical method of testing for water penetration is to intake air through the louver while applying a measured water content into the airstream. The velocity of airflow through the louver free area is increased until the louver allows water to enter. The result of this test is the first point of water penetration - ranging from 300 fpm (a very poor resistor to water entrainment) to 1250 fpm (a very good resistor to water entrainment).
What is the first point of water penetration?
First Point of Water Penetration is the point at which a louver allows the passage of water through the louver. It is a threshold measurement of air intake velocity at which the louver will begin leaking (in feet per minute or fpm).
How to measure resistance of louvers?
The resistance of the louver can be measured by running air through the louver and measuring the pressure differential at various free area velocities (me asured in water gauge or wg). Every louver will create resistance based on the frame and blade shapes. Lower blade angles or more aerodynamic shapes create less resistance.
What percentage of a wall is louver free?
Common louver free areas range from 35% to 60% of the wall opening (65% to 40% obstructed). A high percentage free area is beneficial because more air can enter into a smaller wall opening, reducing the cost of the wall opening and louver. Obviously some obstruction is required in order to keep undesirable water out.
How to determine free area of louver?
Free area is derived by taking the total open area of a louver (after subtracting all obstructions - blades and frame) and dividing by the overall wall opening. This gives a comparison of a louvered opening to an unobstructed opening. Common louver free areas range from 35% to 60% of the wall opening (65% to 40% obstructed). A high percentage free area is beneficial because more air can enter into a smaller wall opening, reducing the cost of the wall opening and louver.
Why is a louver needed?
Obviously some obstruction is required in order to keep undesirable water out. A fully obstructed opening would allow no water in, while a totally unobstructed opening would allow water to enter unimpeded. A properly designed louver will maximize free area while allowing a minimal amount of water to enter.
What are HVAC Louvers
Louvers in HVAC also known as Louvre is an assemble of well-arranged equally equidistant vertical blades, wood, slips of glass, wood, laths, sliths, and some other materials that help regulate the flow of air and also serve as a pathway for light into the building.
How do HVAC louvers work
Louvers serve as the entry and exit point of your ductwork because it covers the openings where your HVAC system takes in and exhausts air.
HVAC louvers free area calculations
You can get the free area of your HVAC louvers by dividing the total open area of the louver (provided that you have subtracted likely obstructions like; blades and frame) by the total wall opening. However, you should know that Louvers, regardless of the size usually with a standard free area.
Types of Louvers in HVAC
We have 4 major types of louvers in HVAC: we have, stationary, combination, adjustable, and air measuring louvers.
Drainable HVAC louvers
Drainable HVAC louvers have an inbuilt gutter that serves as a temporary storage house for water, moisture, dirt, and debris extracted from the airstream before it is finally transferred to outside the building.
Fresh air intake louvers
This type of louvers is used majorly for taking in fresh air from the outside into the building. It has fixed blades that are carefully arranged in a way that will accommodate the passage of air through it while also preventing water or moisture from getting in at a supposed inlet speed.
Custom HVAC louvers
Just like the name implies, custom HVAC louvers are customized louvers designed to match specifications. Unlike the fresh intake and drainable louvers which are readily available, custom louvers are not. The structure of the fan and every other necessary material will be assembled based on the user’s description.
When a louver shape is divided into sections by visible mullions or when various louver shapes are inter?
When a louver shape is divided into sections by visible mullions or when various louver shapes are interdependent and if the blades must line up in the final assembly, always include a sketch of the relative positions of the individual shapes.
Can you butt a louver together?
Louvers built in multiple sections are designed with provisions for thermal expansion and when installed, should never be butted together. When the temperature varies between -35ºC and 40ºC, the thermal expansion of a 10 ft [3m] aluminum louver is almost ¼” [6mm] (steel louvers expand half this amount).